Just as it's important to watch your drinking, maintaining a healthy weight is essential. Of course, you need to eat to survive, but 80 million adults in the US were found to not be living a "healthy lifestyle" based on BMI.

4. Get Physical

Exercising doesn't just burn calories, it can add years to your life. Yet only one-fifth of American adults fulfilled the government's guidelines for encouraged physical activity.

If everyone in the US did those things, researchers predict cancer rates would dip between 40 and 70.